In Chicago, growing anything during the cold winter months makes us happy. Previous years we've experimented, with good success, in growing cool-weather greens upstairs in full-south light with auxiliary lights over the plants. One year we tried it without the lights.
This year, we're going to grow again without auxiliary electricity. We're using EEZY-GRO sub-irrigated pots we got at Menard's, a big-box store. Plants don't drink much in winter, growing slowly with no need for a large water reservoir.
The greens--tatsoi, kale, mustard, all the usual suspects--have a nice start. Somehow these little ones always taste sweetest.